How does that at all address the concerns people have? "No one's forcing you to buy one?" Exactly, and fewer people are going to buy one, given the high price and low shipment numbers. That's supply and demand: Sony has set their price above what many people will reasonably pay for a video game system, and as such, there's going to be fewer PS3's on people's shelves.
The truth is, consumers want to feel like game developers are "forcing people to buy a system" by providing quality games at... well, not a reasonable price, but certainly not a batshit insane one. Sony hasn't gotten a lot of people excited about their system, and as such, they're not even coercing people to buy one. That's the problem.